GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc.
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
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The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2017 Clément Lassieur <clement@lassieur.org>
;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu tests ssh)
#:use-module (gnu tests)
#:use-module (gnu system)
#:use-module (gnu system vm)
#:use-module (gnu services)
#:use-module (gnu services ssh)
#:use-module (gnu services networking)
#:use-module (gnu packages ssh)
#:use-module (guix gexp)
#:use-module (guix store)
#:export (%test-openssh
%test-dropbear))
(define* (run-ssh-test name ssh-service pid-file #:key (sftp? #f))
"Run a test of an OS running SSH-SERVICE, which writes its PID to PID-FILE.
SSH-SERVICE must be configured to listen on port 22 and to allow for root and
empty-password logins.
When SFTP? is true, run an SFTP server test."
(define os
(marionette-operating-system
(simple-operating-system (dhcp-client-service) ssh-service)
#:imported-modules '((gnu services herd)
(guix combinators))))
(define vm
(virtual-machine
(operating-system os)
(port-forwardings '((2222 . 22)))))
(define test
(with-imported-modules '((gnu build marionette))
#~(begin
(eval-when (expand load eval)
;; Prepare to use Guile-SSH.
(set! %load-path
(cons (string-append #+guile-ssh "/share/guile/site/"
(effective-version))
%load-path)))
(use-modules (gnu build marionette)
(srfi srfi-26)
(srfi srfi-64)
(ice-9 match)
(ssh session)
(ssh auth)
(ssh channel)
(ssh sftp))
(define marionette
;; Enable TCP forwarding of the guest's port 22.
(make-marionette (list #$vm)))
(define (make-session-for-test)
"Make a session with predefined parameters for a test."
(make-session #:user "root"
#:port 2222
#:host "localhost"
#:log-verbosity 'protocol))
(define (call-with-connected-session proc)
"Call the one-argument procedure PROC with a freshly created and
connected SSH session object, return the result of the procedure call. The
session is disconnected when the PROC is finished."
(let ((session (make-session-for-test)))
(dynamic-wind
(lambda ()
(let ((result (connect! session)))
(unless (equal? result 'ok)
(error "Could not connect to a server"
session result))))
(lambda () (proc session))
(lambda () (disconnect! session)))))
(define (call-with-connected-session/auth proc)
"Make an authenticated session. We should be able to connect as
root with an empty password."
(call-with-connected-session
(lambda (session)
;; Try the simple authentication methods. Dropbear requires
;; 'none' when there are no passwords, whereas OpenSSH accepts
;; 'password' with an empty password.
(let loop ((methods (list (cut userauth-password! <> "")
(cut userauth-none! <>))))
(match methods
(()
(error "all the authentication methods failed"))
((auth rest ...)
(match (pk 'auth (auth session))
('success
(proc session))
('denied
(loop rest)))))))))
(mkdir #$output)
(chdir #$output)
(test-begin "ssh-daemon")
;; Wait for sshd to be up and running.
(test-eq "service running"
'running!
(marionette-eval
'(begin
(use-modules (gnu services herd))
(start-service 'ssh-daemon)
'running!)
marionette))
;; Check sshd's PID file.
(test-equal "sshd PID"
(wait-for-file #$pid-file marionette)
(marionette-eval
'(begin
(use-modules (gnu services herd)
(srfi srfi-1))
(live-service-running
(find (lambda (live)
(memq 'ssh-daemon
(live-service-provision live)))
(current-services))))
marionette))
;; Connect to the guest over SSH. Make sure we can run a shell
;; command there.
(test-equal "shell command"
'hello
(call-with-connected-session/auth
(lambda (session)
;; FIXME: 'get-server-public-key' segfaults.
;; (get-server-public-key session)
(let ((channel (make-channel session)))
(channel-open-session channel)
(channel-request-exec channel "echo hello > /root/witness")
(and (zero? (channel-get-exit-status channel))
(wait-for-file "/root/witness" marionette))))))
;; Connect to the guest over SFTP. Make sure we can write and
;; read a file there.
(unless #$sftp?
(test-skip 1))
(test-equal "SFTP file writing and reading"
'hello
(call-with-connected-session/auth
(lambda (session)
(let ((sftp-session (make-sftp-session session))
(witness "/root/sftp-witness"))
(call-with-remote-output-file sftp-session witness
(cut display "hello" <>))
(call-with-remote-input-file sftp-session witness
read)))))
;; Connect to the guest over SSH. Make sure we can run commands
;; from the system profile.
(test-equal "run executables from system profile"
#t
(call-with-connected-session/auth
(lambda (session)
(let ((channel (make-channel session)))
(channel-open-session channel)
(channel-request-exec
channel
(string-append
"mkdir -p /root/.guix-profile/bin && "
"touch /root/.guix-profile/bin/path-witness && "
"chmod 755 /root/.guix-profile/bin/path-witness"))
(zero? (channel-get-exit-status channel))))))
;; Connect to the guest over SSH. Make sure we can run commands
;; from the user profile.
(test-equal "run executable from user profile"
#t
(call-with-connected-session/auth
(lambda (session)
(let ((channel (make-channel session)))
(channel-open-session channel)
(channel-request-exec channel "path-witness")
(zero? (channel-get-exit-status channel))))))
(test-end)
(exit (= (test-runner-fail-count (test-runner-current)) 0)))))
(gexp->derivation name test))
(define %test-openssh
(system-test
(name "openssh")
(description "Connect to a running OpenSSH daemon.")
(value (run-ssh-test name
;; Allow root logins with an empty password to
;; simplify testing.
(service openssh-service-type
(openssh-configuration
(permit-root-login #t)
(allow-empty-passwords? #t)))
"/var/run/sshd.pid"
#:sftp? #t))))
(define %test-dropbear
(system-test
(name "dropbear")
(description "Connect to a running Dropbear SSH daemon.")
(value (run-ssh-test name
(service dropbear-service-type
(dropbear-configuration
(root-login? #t)
(allow-empty-passwords? #t)))
"/var/run/dropbear.pid"))))
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